We actually had an officer in our regiment back in Germany in the 60's called Franckenstein. A 2nd lieutenant so addressed as MR Franckenstein That is the correct spelling by the way perhaps Mary could not spell . It was amusing if he had an early call booked and there was a sprog on duty. As watching their face when they read the name was often a picture. He went on to the states and was in a lot of films and TV series, died last year